It should be noted that QU is not congruent to RV.
It should be noted that congruence simply means that the sides are the same.
From the information,
QU + UR = QR = 4cm
QU = UR
QU = 2cm
RV + VS = RS = 2vm
RV = VS
RV = 2/2 = 1 cm
Therefore, QU is not equal to RV
Therefore, it should be noted that QU is not congruent to RV.
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